Stores will sell you all kinds of gaudy holiday ornaments, but there’s nothing like the style and class achieved by building your own. [w3arycod3r] did just that, whipping up the fun and festive Neodriver Ornament.
It’s a battery-powered build, and runs off an rechargeable 18650 cell which provides several days of operation at a low duty cycle. An ATtiny85 is charged with sending out commands to various NeoPixel devices, from rings to rectangular arrays. [w3arycod3r] then designed various PCBs that could carry the hardware and battery in a well-balanced package that would hang nicely when suspended from a ribbon on a Christmas tree.
As is always the fun part with addressable LEDs, [w3arycod3r] whipped up some fun animations to suit. The 5×5 rectangular arrays of NeoPixels are able to deliver scrolling text, while another animation blips out the RNA sequence of everyone’s least favorite coronavirus, SARS-CoV-2. Getting everything to fit into a ATtiny85’s 8 KB of code space and 512 byte EEPROM was a challenge, but slimming down the Adafruit NeoPixel library and using direct AVR register manipulation in place of regular Arduino functions helped.
Overall, it’s a fun holiday build that looks great on the tree. Alternatively, consider making yourself some rheoscopic ornaments this holiday season. And, if you’ve whipped up your own fun holiday build, throw it on the tipsline!
It’s very hard to find attiny85 those days. Only the sop/soic package is (barely) available.
Are these counterfeit or something?
https://www.aliexpress.us/item/2255799872898100.html
I dont know. I kinda.. guess.
But indeed, aliexpress is the last place i could find some. Usually more expensive than that (~5/6 $/item, without shipping).
If you’re in Germany, Reichelt has them in stock for around 1 to 2€. DIP and SMD…
Mouser has ATTiny85 in SOIC every now and then, indeed, about 1EUR apiece. avoid LCSC, their markup is hell =D
Does it even blink out the gene for the furin cleavage site
> while another animation blips out the RNA sequence of everyone’s least favorite coronavirus, SARS-CoV-2
I’d rather not play favourites with coronaviruses… they’re equally bad in my book.
I mean the common cold is one of them but fair dibs
Covid has made some entities very rich.
It’s not even my birthday, too early for talk of Christmas.
“an rechargeable” – no.
“An ATtiny85” – yes.